Stove



1. w. nu PU-Y.

STOVE.

APPLICATION FILED NOV. 10, 1920.

Patent ed Oct. 18, 1921.

2 SHEETS-SHEET I.

INVE. TOR

EQE.

JOHN W. DU IPUY, OF BEAVER FALLS BOROUGH, PENNSYLVANIA.

STOVE.

Specification of Letters Patent.

Patented (lot. 18, 1821.

Application filed November 10, 1920. Serial No; 423,029.

To all whom it may concern:

Be it known that I, JOHN W. DU PUY, a citizen of the United States, andresiding in the borough of Beaver Falls, in the county of Beaver andState of Pennsylvania, have invented or discovered the new, useful, andImproved Stove, of which the following is a specification.

My invention consists in certain new and useful improvements in cookingstoves or ranges, and while the same is more particularly intended to beapplied to combination stoves in which both solid and fluid fuel may beused, it may also be advantageously applied to a solid or to a fluidfuel stove.

In combination stoves 'difiiculty has been experienced in properly anduniformly heatin the oven throughout.

n my present invention I show a novel flue arrangement wherein a uniformand satisfactory heating of the bottom, top and sides of the oven isprovided for when either solid or fluid, either liquid or gaseous, fuelis used.

I have also produced a combination stove provided with but a singledamper by the manipulation of which the stove may be instantly changedfrom one fuel to the other without the removal or substitution of anyparts.

Other novel features of construction and arrangement will appear fromthe following description.

In the accompanying drawings, which are however merely intended to showa practical embodiment of the principles of my invention withoutlimiting the scope of the latter to the construction shown, Figure 1 isa perspective of a stove embodying the principles of my invention, thefront and top thereof being partially broken away; Fig. 2 is a verticalcross section of the same; Fig. 3 is an end view looking toward theright in Fig. 1; Fig. at is a sectional view taken along the lineIV-IVin Fig. 2; Fig. 5 is a rear end view of the top flue plate; 6 is a planview of the same,'and Fig. 7 is a perspective of the burner. Fig. 8 is ahorizontal section along the line VIII-VIII in Fig. 2 with the top flueplate omitted.

A is the oven inclosed by tight walls on all sides except the frontwhich is provided with a door 1 suitably hinged in place. B is thefirebox for coal or other solidfuels, and shown positioned to the leftof the oven A while to the right of said oven is the gas burner box C.

If desired the positions of the fire box and the gas burner box may bereversed, but as the fire box is usually placed at the left of the ovenin a coal stove, I have adopted this arrangement for the sake ofillustration. Also, for the purposes of convenient descrlption I termthe vertical flue interposed between the oven and the fire box the leftflue and that on the opposite side of the oven the right flue, saidterminology being usedfor purposes of identification but not to indicatetheir exact or invariable locations relative to the oven.

2 is a suitable grate in the fire box B, and beneath said fire box isthe usual ash pit. 3 and 4 represent doors in the front wall of thestove for access to the fire box and ash pit.

Referring now to the exterior walls of the stove, 5 is. the back wall, 6and 7 its end walls, 8 the bottom, and 9 the front wall which surroundsthe oven door. D is the top plate of the stove covering the fire box,the oven and the gas burner box, and apertured to receive the usualstove lids 10. The stove may be supported by the usual legs 11 and beprovided with suitable trim 12.

In the drawings the oven is shown cast integral with the back wall 5 butof course it may be a distinct element secured in place.

13 is a vertical partition wall extending from back to front of thestove and from the bottom up to substantially the level of the top ofthe oven. Said partition forms the inner wall of the fire box and ashpit, and 14 is the renewable fire back protecting the same in the firebox.

Said partition is spaced from the oven A to form the vertical left flue15 whose lower end connects with'the bottom flue 16 formed by the bottomof the stove and the bottom of the oven. The other end of the bottomflue 16 connects'with the lower end of the vertical right flue 17 whoseupper end is stepped in over the oven, as shown at 17* in Fig. 1 to giveclearance for the end of the gas burner box C.

18 is a sunken seat in the floor of the flue 16 adjacent to the flue 15,and in which is mounted the oven gas burner E provided with rows ofperforations 19 on either side. Said burner is provided with a gassupply pipe 20. 21 is a lid for said seat adapted r as who used forthrowing the lid. In Fig,

to close in and protect said burner E when coal is used as the fuel forheating the oven. Said lid is secured on a pivot shaft 22 whose endsarejournaled in the walls of the stove and whose front end protrudes so 1the lid is shown thrown back to expose .the burner for lighting.

F is the top flue plate having its ends sharply inclined downwardly toengage the top'ofthe partition 13 and the top of oven A to the left ofthe upper end of the flue 17. Thus a lowertop flue 23 is formed be tweenthe plate F and the top of the oven, with which flue the left flue 15communicates. Also an upper top flue 24, between said plate F and thetop plate 1) is formed, with which flue the upper end of the right flue17 communicates. Also the fire box B communicates with the upper topflue 24 over the top of the partition 13 and the in clinedend'of theplate F.

G represents an exit flue box, with an open front, which is riveted orbolted against the rear wall 5 of the stove. The lower end of said'boxis curved into the wall of the stove toiclose the flue, while its upperend is extended rearwardly and provided with an integral collar 25 forthe attachment ofthe stove pipe.

, 26 is a'port through the back wall 5 connecting the bottom flue 16with the interior of box G.

The upper end of theflue box G is pro= videdwith an integral throat box27 which fits into an opening in the back wall 5 thus connecting thelower and upper top flues 23 and '24with the interior of the box G. Therear edge of the plate F adjacent to the throat 27 is flared upwardly,as at 28 to enlarge the escape passage of the flue 23.

The upper surface of the plate F is preferably cross ribbed as at 29 toincrease the radiating surface of the plate and to strengthen it. J

H is the damper mounted on a pivot shaft 30 horizontally journaled inthe box G below the flue exit 27. The end of shaft 30 protrudes from thebox and is provided with a handle for. swinging the damper. When thedamper is in its horizontal position, shown in Figs. 2 and 4, with itsfree edge resting on the ledge 31 and its offset tail underthe bottombar 32 of the throat box, the lower end of the box G is closed, ineifect sealing the port 26, while the fines 23 and 24 are incommunication with the escape or stove. pipe. When the damper is turnedup against the throat box 27, in a forward and upwardly inclinedposition, then the flues 23 and 24 are shut off from the smoke pipe butthe products of combustion escape freely from. the bottom flue 16through the port 26.

33 is a port in the wall 5 connecting the rear interior of the gasburner box C to the throat 27, and 34 is a slide valve. controlling saidport, so that when the top gas burners are in use the fumes may escapeto the stove pipe.

It will be noticed that the bottom flue is of greater capacity than theflues 15 and 17;

that flue 17 is of greater capacity than flue the damper H isthrown intothe position shown in Figs. 2 and 4, the lid 21. is turned back, asshown in Fig. 1, and the oven burner E is lighted. The products ofcombustion will fill the bottom flue 16 and pass up on either side ofthe oven through the flues 15 and 17, the fumesfrom the flue 15 willpass over the top of the oven through the lower top-flue 23andescapethrough the throat 27, and the fumes from the flue 17 will passinto the uppertopflue 24 and escape through the. throat 27; It isevident that the oven is thoroughly and uniformly heated atthe bottom,sides-and top.

For the sake of illustrationl have shown the. course of the heatcurrents from the burner E by means of long arrows in Fig. 1.

If desired while the .burner Ev is in use, a coal or other. solid fuelfire may be maintained in the fire box B, the products of com bustionpassing into the upper top flue 24 to the open throat 27.

When solid fuel is used to heat the oven, the damper H is turnedv up toclose the throat 27, and-the lid 21 is turned down over the burner E toprotect'it from soot. The products ofcombustion now travel, as shown. bytheshort arrows in Fig. 1, from the fire box B through the upper topflue 24 to. the flue 17and down the same'to the bottom flue ,16 whencethey escape through the port 26 to thebox G. and thence to the stovepipe. The heat from the fire box B radiates through the fire back 14 andthe partition 13,

and across-the. flue 15'to the left wall of the fire box and the ovenprevents over heating ofthe adjacent portions of the oven, acharacteristic fault of combination stoves unprovided with suchv avflue. 'Likewise the overheating of the top of the oven by the 7 heatescaping directly from the fire box.

It is evident from the foregoing that my improved combination stovefulfils'every requirement of two stoves, one for fluid and one for solidfuel. \Vith either fuel an even and uniform circulation of heat ismaintained about the oven insuring successful anduniform baking. Thestove may be changed from one fuel to the other in a moment or bothcharacters of fuel may be used at once; a great advantage where apartial gas failure is occurring.

I have described gas as the fluid fuel used but it is perfectly evidentthat oil or any other kind of fluid fuel may be substituted, a properburner for the same being installed in place of the oven gas burner E.

It will be understood that my oven flue construction can also beadvantageously applied to stoves adapted exclusively to the use ofgaseous or liquid fuel.

Although, for the sake of clearness in describing the embodiment of theprinciples of my invention illustrated in the drawings, I have minutelydescribed the same, I do not intend to limit myself thereby, but claimbroadly- 1. In a cooking stove, the combination of an oven, a bottomflue beneath said oven and into' which the products of fuel combustionare discharged, a vertical flue at each side of said oven connected attheir lower ends with the ends of said bottom flue, a pair of top fluesabove said oven, one of said top flues being directly connected witheach of said vertical flues and said top flues being sealed from eachother, and a throat box at the rear of said stove directly connected toeach of said top flues.

2. In a cooking stove, the combination of an oven, a bottom flue beneathsaid oven, means for discharging the products of fuel combustion intosaid bottom flue near one end of the same, a vertical flue at each sideof said oven connected at their lower ends with the ends of said bottomflue, the vertical flue nearer the discharge point of said productsbeing of less capacity than the other vertical flue, a pair of top fluesabove said oven, one of said top flues being clirectly connected witheach of said vertical flues and said top flues being sealed from eachother, and a throat box at the rear of said stovedirectly connectedtoeach of said top flues.

3. In a cooking stove, the combination of an oven, a bottom flue beneathsaid oven, means for discharging the products of fuel combustion intosaid bottom flue, a vertical flue at each end of said oven, a pair oftop flues above said oven, one of said top flues being superimposed onthe other and said top flues being sealed from each other, one

of said top flues being directly connected to each of said verticalflues, and a throat box directly connected to each of said top flues.

4. In a cooking stove, the combination of an oven, a bottom flue beneathsaid oven, means for discharging the products of fuel combustion intosaid bottom flue at a point nearer one end of the same, a vertical flueat each side of said oven connected to the ends of said bottom flue, thevertical flue nearer the point of discharge of products of combustionbeing of the lesser capacity, a pair of top flues above said oven, oneof said top flues connected to each of said vertical flues and said topflues being superimposed one on the other and sealed from each other,and a throat box directly connected to each of said top flues.

5. In a combination stove for the purposes described, the combination ofan oven, a fire box for solid fuel adjacent to said oven, a bottom fluebeneath said oven, means for discharging the products of combustion offluid fuel into said bottom flue, a vertical flue extending upwardlyfrom one end of said bottom fine and interposed between said oven andsaid fire box, a second vertical fiue extending up from the other end ofsaid bottom flue, a pair of top flues one of which connects with the topof the first named vertical flue while the other top flue connects withthe top of said second named vertical flue and also with said fire box,an escape flue connected directly with said bottom flue and with each ofsaid top flues, and damper mechanism for shutting off either said bottomflue or both said top flues from said escape flue.

6. In a combination stove for the purposes described, the combination ofan oven, a fire box for solid fuel adjacent to said oven, a bottom fluebeneath said oven, means for discharging the products of combustion offluid fuel into said bottom flue, a vertical flue ex tending upwardlyfrom one end of said bottom flue and interposed between said oven andsaid fire box, a second vertical flue extending up from the other end ofsaid bottom flue, a pair of top flues, one superimposed on the other,above said oven, the lower top flue being connected to the first namedvertical flue while the upper top flue is connected to the othervertical flue and to the fire box, and an escape flue in directcommunication with each of said top flues.

7. In a combination stove for the purposes described, the combination ofan oven, a fire box for solid fuel adjacent to said oven, a bottom fluebeneath said oven, means for discharging the products of combustion offluid fuel into said bottom flue, a vertical flue extending upwardlyfrom one end of said bottom flue and interposed between said oven andsaid fire box, a second vertical flue extending up from the other end ofsaid bottom flue, a pair of topflues, one superimposed on the other,above said oven, the lower top flue being connected to the first namedvertical flue while the upper top flue is connected to the second namedvertical flue and to said fire box, an escape flue connected at thebottom to said bottom flue and at the top to both of said top flues, anddamper mechanism for connecting either said bottom flue or both of saidtop flues to said escape flue.

8. In a combination stove for the purposes described, the combination ofan oven, a solid "fuel fire box, a bottom flue beneath said oven, meansfor discharging the products of combustion of fluid fuel into saidbottom flue, a vertical flue communicating with one end of said bottomflue and interposed between said oven and said fire box, a secondvertical flue communicating with the other end of said bottom flue andextending up along the other side of said oven, a pair of top flues,above said oven, one of said flues being superimposed on the'other, thelower of said top flues communicating with said first mentioned verticalflue and other of said top flues communicating with said secondmentioned vertical flue and also with said fire box, an escape flue indirect communication with said bottom flue and with both of said topflues, and damper mechanism whereby the products of combustion may bedischarged either from said bottom flue or from said top fluesinto saidescape flue;

9. In a combination stove for the purposes described, the combination ofan oven, a fire box for solid fuel adjacent to said oven, a bottom fluebeneath said oven, means for discharging the products of 'combustion offluid fuel into said bottom flue, a vertical flue extending upwardlyfrom one end of said bottom flue and interposed between said oven andsaid fire box, a second vertical-flue connected to the other end of saidbottom flue, a pair of top flues, one superimposed on the other abovesaid oven, the lower top flue being connected to the first namedvertical flue and the upper top flue being connected to the second namedvertical flue and to the fire-box, an escape flue connected at itsbottom to the bottom flue and at its top to both of said top flues, anda damper in said escape flue adapted when in its one position to shutoff said bottom flue from and connect rboth of'said top 'flues directlywith said escape flue and when in its other position to shut off bothofsaid top flues from' and to connect said bottom flue with said escapeflue.

Signed at Pittsburgh, Pa., this 4th day of November, 1920.

JOHN w. DU PUY.

